Fire-box for boilers



&No Model.) 3 Sheets-Sheet 1. E. INGLETON. FIRE BOX FOB. BOILERS.

Patented Dec, 17,1895.

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ANDREW .IGIMIAM.H'IOTD-UTHQWISIMNGTOMBL (No Model.) I 3 Sheets-8heet 2.HINGLBTON. FIRE BOX FOR BOILERS.

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(No Model.) 3 Sheets-Sheet 3. B. INGLETON.

FIRE BOX FOR BOILERS. No. 551,548. Patented Dec. 17, 1895.

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NITED ST TES PATENT FFlE.

EDXVAED INGLETON, OF POTTSTO\VN, PENNSYLVANIA.

FIRE-BOX FOR BOILERS.

SPECIFICATION forming part of Letters Patent No. 551,548, dated December17, 1895.

Application filed August 16 1 8 9 5 To all whom it may concern:

Be it known that I, EDWARD INGLETON, of Pottstown, in the county ofMontgomery and State of Pennsylvania, have invented a new and usefulImprovement in Fire-Boxes for Boilers, of which the following is a full,clear, and exact description.

My invention relates to an improvement in fire-boxes for boilers oflocomotives and traction-engines; and the object of the invention is toprovide a tubular fire-box, the fire box being constructed entirely oftubes with their ends reduced so as to allow them to be brought tighttogether, making thereby a fia-metight tubular box; and a further objectof the invention is to provide for sufficient material between the tubesat bottom and top, or where they enter the water legs or drums, to admitof proper fastening by expanding in the ordinary way.

A further object of the invention is to provide adctachable fire-box, orone which may be expeditiously and conveniently entirely removed fromthe boiler for cleaning and repairs, and furthermore to so construct thefire-box and so connect it with the interior of the boiler that aperfect circulation of water will be obtained, the nozzle adapted toreturn water into the boiler being placed under the water-line for thepurpose of keeping the firebox constantly charged, and whereby alsounder the said construction of fire-box the tubes cannot become short ofwater so long as there is a reasonable quantity in the boiler, no matterwhether the engine is going up a hill or down a grade.

Another object of this invention is to provide cleaning devices for thelower muddrums or water-legs, whereby the latter may be expeditiouslyand conveniently cleaned from all sediment, mud, Sac.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1. is a longitudinal vertical section through the improved fire-bon and the boiler to which it is applied. Fig. 2 is a plan view SerialNo. 559,521. (No model.)

of the fire-box and boiler, a portion of the jacket of the fire-box anda portion of sundry of the tubes being broken away. Fig. 3 is a frontelevation of the improved fire-box, and

Fig. 4c is a transverse section taken on the .i e is connected with adrum or water-le l a:

the latter being designated, respectively, as 1i and 15, as is alsoshown in Fig. 2. These water legs or drums 1i and 15 constitute thelower side portions of the fire-box l3, and a third water leg or drum 1Gis employed, which is preferably given an upward and a rearwardinclination, being connected at its higher end with the head of theboiler, as shown in Fig. 1, the said head having an opening 17 thereincommunicating with the interior of the aforesaid upper drum. The upperdrum where it connects with the head of the boiler is provided with aflange, and is secured to said head by bolts or their equivalents, andwhere the lower drums or watenlegs 1i and 15 connect with the branchpipes of the water-pocket flanges the bolts are likewise employed. Thelower water-drums are closed at their forward ends by caps 18 or theirequivalents, as shown in Figs. 1 and 3, and in each of the lower waterlegs or drums a screw 19 is journaled, one end of which extends outthrough the caps of the drums and is adapted to be turned by a crank 20or its equivalent. These screws are adapted to clean the lowerwater-legs or mud-drums from mud or other sediment, the said sedimentfinding escape through valved pipes 21 connected with the lower portionof the forward ends of the said drums.

The construction of the body of the fire-box is completed by forming itssides of a series of circulating-tubes 22, and these tubes are placed soclose together as to form a flametight joint between them. All of thecirculating-tubes are provided with reduced upper and lower extremities23, and the lower reduced ends of the circulating-tubes are made toenter the lower water-legs or mud-drums, while the upper ends of thesaid tubes are entered into the uppe r water-leg l0, and the said.circulating-tubes are secured in the waterlegs by expanding theirreduced ends in the ordinary way.

By reducing the ends of the circulating tubes sufficient material isleft between the tubes in the waterlegs to admit of an expander beingused, and consequently an exceedingly tight and economical joint can beobtained. .At the same time the bodies of the tubes come close togetherand form a fire-tight side and top to the fire-box, since, as shown inFig. i, the circulating tubes are carried vertically upward from thelower mud-drums or water-legs, and are then curved inward to aconnection with the upper watenleg which is located at the centralportion of the firebox.

A nozzle 24. is made to surround the open in g 17 leading into the upperwater-leg from the boiler, and the said nozzle is curved downward tosuch an extent that its lower end wilhbe below the water-line. Theobject in carrying this nozzle d own below the waterline is for thepurpose of keeping the tubes of the fire-box always charged with water.The throat-sheet 25 is carried some distance beneath the boiler andsomewhat near the water-pocket, and short tubes 96, which are notcirculating-tubes, form the rear side portions of the firebox. Asstated, however, these short tubes are not eirculating'tubes, and arecapped at their upper ends, their lower ends, however, being expanded inthe lower water-legs or mud-drums in the same manner as thecirculating-tubes. They are simply intended to complete the sides of thefire-box back as far as the throat-sheet. The object in placing thethroat-sheet so far back under the boiler proper is to protect it fromfierce fire, and for the same reason these short tubes are not seriouslyexposed. Hence the want of circulation is not important.

hen the boiler has received its proper quota of water, all of thecirculating-tubes will have been filled for practically their entirelength, and as soon as ebullition takes place in the boiler everycirculating-tube will be filled with water from end to end, and likewisethe upper water-leg throughout its entire length. The fire-box isprovided with a jacket 27, and between the jacket and upper drum abacking 28 of asbestos or other fireproof material is located, and asimilar backing 28 is placed between the circulatingtubes and thevertical walls of the fire-box jacket, as shown in Fig. 2.

It will be observed that the circulation in this fire-box will becomplete, since the wa ter entering at the lower water-legs will pass upthe circulatingtubes into the upper waterleg and thence back into theboiler. Any approved form of grate 29 may be employed for the fire-box.

One of the advantages of this fire-box is that it may be readily removedfrom the boiler for cleaning or for repairs, and this is accomplished bybreaking three joints onlynamely, removing the bolts from the flanges ofthe water-legs where they connect with the head of the boiler and withthe branches from the water-pocket.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. In a fire box for boilers, the combination of twohorizontal water legs arranged upon opposite sides of the fire box atits bottom, a single water leg arranged longitudinally in the middleline of the firebox at the top, and two separate series of water tubes,each series being arranged upon one side of the fire box with theirtubes in tight juxtaposition, both ends of said tubes being reduced insize, and their lower ends entered into and expanded within the lowerwater legs, and their upper ends bent inwardly, reduced, and enteredinto and expanded within the sides of the middle water leg at the top ofthe fire box, substantially as and for the purpose set forth.

2. In a fire box for boilers, the combination of two horizontal waterlegs arranged upon opposite sides of the fire box at the bottom, asingle inclined water leg arranged longitudinally in. the middle line ofthe fire box at the top and having its lower end at the front or thefire box and its upper en d communicating with the boiler, and twoseparate series of water tubes, each series being arranged upon one sideof the fire box with their tubes in tight juxtaposition, both ends ofsaid tubes being reduced in size, and their lower ends entered into andexpanded within the lower water legs, and their upper ends being bentinwardly, reduced, and entered into and expanded within the sides of themiddle water leg at the top of the fire box, substantially as and forthe purpose described.

3. A detachable fire box chamber comprising two horizontal water legs atthe bottom, a middle water leg at the top, both being provided withdetachable couplings for the boiler, and two series of tightlyjuxtaposed vertical tubes connected at top and bottom with the saidwater legs and forming therewith an integrally removable fire boxchamber, substantially as shown and described.

4. The combination, with a boiler, of a fire box, said fire boxconsisting of lower water legs, an upper water legconneoting with theboiler and provided with a nozzle extending within the boiler below itswater line, and tubes forming the sides and substantially the top of thefire box,tl1e said tubes being brought together with a substantiallyflame-tight connection, having one extremity secured in a lower waterleg and the other extremity in the upper water leg, as and for thepurpose specified.

5. The combination, with a boiler, its water pocket and branches fromthe same, of a fire box comprising lower water legs remov- IIO ablyconnected with the branches of the water may be removed therefrom forcleaning purpoeket, an upper waiter leg removably conposes or forrepairs, substantially as shown neeted with the head of the boiler, andtubes and described.

connected with the upper and lower Water EDW'ARD 1N ErLETON. legs,forming the sides and substantially the Witnesses:

top of the fire box, whereby upon diseonneet- H. S. FISHER,

ing the Wat-er legs from the boiler the fire box S. H. BROWN.

